Mellanox ConnectX-3 Pro EN Network Interface Card 10GbE Dual-Port SFP+ – MCX312C-XCCT

Mellanox ConnectX-3 Pro EN Dual-Port 10GbE SFP+ Network Adapter — MCX312C-XCCT

The Mellanox MCX312C-XCCT is a dual-port 10 Gigabit Ethernet SFP+ PCIe network interface card based on the ConnectX-3 Pro EN controller. Delivering 10GbE per port with RDMA over Converged Ethernet (RoCE), SR-IOV hardware virtualization, and hardware offloads, it is designed for data center servers requiring high-throughput, low-latency 10GbE connectivity with advanced virtualization and storage networking support.

Key Features

• Dual 10GbE SFP+: Two independent 10G ports for high-bandwidth server connectivity
• ConnectX-3 Pro EN: Mellanox”s proven enterprise NIC controller
• RDMA / RoCE: Low-latency remote direct memory access
• SR-IOV: Hardware virtualization for VMware, KVM, Hyper-V
• Hardware Offloads: Reduces CPU overhead for network processing
• Broad OS Support: Windows Server, Linux, VMware ESXi

Technical Specifications

• Part Number: MCX312C-XCCT
• Controller: Mellanox ConnectX-3 Pro EN
• Ports: 2x 10GbE SFP+
• Host Interface: PCIe 3.0 x8
• Speed: 10 Gbps per port
• Features: RDMA/RoCE, SR-IOV, hardware offloads
• OS Support: Windows Server, Linux, VMware ESXi

Use Cases

• Data Center Networking: 10GbE server connectivity for enterprise networks
• Storage Networking: iSCSI and NFS over 10GbE for SAN/NAS connectivity
• Virtualization: SR-IOV for VMware and KVM environments
• HPC: RDMA/RoCE for low-latency MPI workloads

Compatibility Notes

• Compatible with 10GbE SFP+ DAC cables, AOC cables, and optical transceivers
• Requires PCIe 3.0 x8 slot for full bandwidth
• Supported on Windows Server 2012 R2+, RHEL/CentOS 6+, Ubuntu, VMware ESXi 5.5+
• Compatible with major 10GbE switch vendors: Cisco, Arista, Juniper, Mellanox

Frequently Asked Questions

Is the MCX312C-XCCT compatible with 1GbE SFP modules?

The MCX312C-XCCT is a 10GbE adapter — 1GbE SFP modules are not supported. Use 10GbE SFP+ DAC cables or optical transceivers.

Does this adapter support RDMA?

Yes — the ConnectX-3 Pro supports RDMA over Converged Ethernet (RoCE) for low-latency storage and HPC workloads.

What is the difference between ConnectX-3 and ConnectX-3 Pro?

The ConnectX-3 Pro adds enhanced RoCE v2 support and additional hardware offload capabilities compared to the standard ConnectX-3.

Product Details

• Part Number: MCX312C-XCCT
• Manufacturer: Mellanox (NVIDIA)
• Model: ConnectX-3 Pro EN
• Product Type: Dual-Port 10GbE PCIe Network Adapter

Whether you are deploying 10GbE in a data center, adding RDMA for storage networking, or enabling SR-IOV for virtualized environments, the Mellanox MCX312C-XCCT delivers the throughput, low latency, and ConnectX-3 Pro reliability your infrastructure demands.